Process for matting of textiles



Patented Feb. 2, 1943 PROCESS FOR MATTING OF TEXTILES Albert Landolt, Riehen, Switzerland, assignor to Society of Chemical Industry in Basie, Basel,

Switzerland No Drawing. Application August 17, 1940, Serial No. 353,149. In

4 Claims.

It has been four -rat the aqueous suspensions of finely dispersed inorganic pigments, which are obtained with the help of watersoluble salts of trivalent metals, or of metals of higher valencies, may be used successfully for the matting of textiles. These suspensions may serve as baths from which the pigments have an unexpected amnity for the fiber. The matting may take place in such a manner that the pigments are caused to be absorbed onto the textile material (for example, regenerated cellulose rayons or rayons consisting of cellulose ethers or esters, mercerized cotton, natural silk, etc.), which preferably takes place by simple working of the goods to be matted in dilute matting baths. The process may also be carried out by treating the textiles with concentrated suspensions for a short time and then drying. The matting efiects thus obtained surprisingly enough do not dust and withstand washing very well indeed.

Pigments which come into consideration are, for example, titanium dioxide, barium sulfate, china clay (kaolin), antimony oxide, as well as colored pigments, such as iron oxide, cadmium sulfide.

By salts of polyvalent metals, those salts are to be understood in which the metal is found as cation and is at least trivalent. Thus, for example, aluminium salts, titanium salts, zirconium salts, iron salts, cerium salts, etc., come into consideration.

The following examples illustrate the invention, the parts being by weight:j

Example 1 10 parts of titanium dioxide (titanium white of commerce) and 1 part of aluminum triformate are pasted together with a little water, and

Switzerland August 19, 1939 ium sulfate, titanium sulfate, iron chloride, zirconium hydroxychloride and the like.

Example 2 ous media, which comprises treating the said textiles with a matting bath which contains, as the essential mattingeeflfecting ingredients, an inorganic matting pigment and a dissolved salt of a metal which is at least trivalent, the metal being present in the salt as cation.

2. Process for the matting of textiles consisting of regenerated cellulose with the help of inorganic pigment suspensions in aqueous media, which comprises treating the said textiles with a matting bath which contains, as the essential matting-efiecting ingredients, an inorganic mat ting pigment and a dissolved colorless salt of a metal which is at least trivalent, the metal being present in the salt as cation.

3. Process for the matting of textiles consisting of regenerated cellulose with the help. oftitanium dioxide suspensions in aqueous media, which comprises treating the said textiles with a matting bath which contains, as the essential matting-efiectmg ingredients, titanium dioxide and a dissolved colorless salt of a metal which is at least trivalent, the metal being present in the salt as cation. I

4. Process for the matting of {textiles consistin: of regenerated cellulose with the help of titanium dioxide suspensions in aqueous media, which comprises treating the said textiles with a matting bath which contains, as the essential matting-effecting ingredients, titanium dioxide, and dissolved aluminum fcrmate.

ALBERT LANDOLT. 

